/* roulang page: index */
:root {
      --bg-base: #060b19;
      --bg-surface: #0b1739;
      --bg-glass: rgba(15, 23, 42, 0.72);
      --border-glass: rgba(0, 210, 255, 0.18);
      --border-glass-hover: rgba(0, 210, 255, 0.55);
      --primary: #0052d9;
      --accent: #00d2ff;
      --accent-glow: rgba(0, 210, 255, 0.35);
      --success: #10b981;
      --warning: #f59e0b;
      --text-white: #ffffff;
      --text-muted: #94a3b8;
      --text-dark: #64748b;
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 22px;
      --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.45);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--bg-base);
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(0, 82, 217, 0.22) 0%, transparent 40%),
        radial-gradient(circle at 85% 80%, rgba(0, 210, 255, 0.15) 0%, transparent 45%);
      background-attachment: fixed;
      color: var(--text-white);
      font-family: var(--font-family);
      line-height: 1.65;
      font-size: 15px;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    button, input, select, textarea {
      font-family: inherit;
      border: none;
      outline: none;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部双行吸顶导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(6, 11, 25, 0.88);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border-glass);
    }

    .top-bar {
      font-size: 12px;
      color: var(--text-muted);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      padding: 6px 0;
    }

    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    .top-bar-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .main-nav {
      padding: 12px 0;
    }

    .main-nav .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--text-white);
    }

    .brand-logo-badge {
      width: 38px;
      height: 38px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--primary), var(--accent));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      box-shadow: 0 0 16px var(--accent-glow);
    }

    .nav-links {
      display: flex;
      gap: 28px;
      list-style: none;
      align-items: center;
    }

    .nav-links a {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
      position: relative;
      padding: 4px 0;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent);
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: var(--transition);
      border-radius: 2px;
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .mobile-menu-btn {
      display: none;
      background: transparent;
      color: var(--text-white);
      font-size: 24px;
      cursor: pointer;
      padding: 4px;
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 26px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      white-space: nowrap;
      min-height: 44px;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
      color: #ffffff;
      box-shadow: 0 0 20px rgba(0, 210, 255, 0.35);
      border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .btn-primary:hover {
      box-shadow: 0 0 28px rgba(0, 210, 255, 0.65);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid var(--border-glass);
      color: var(--text-white);
      backdrop-filter: blur(10px);
    }

    .btn-outline:hover {
      border-color: var(--accent);
      color: var(--accent);
      transform: translateY(-2px);
    }

    /* 板块结构与排版 */
    section {
      padding: 84px 0;
      position: relative;
    }

    .section-darker {
      background: rgba(11, 23, 57, 0.45);
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 56px auto;
    }

    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      padding: 5px 14px;
      border-radius: 999px;
      background: rgba(0, 210, 255, 0.12);
      color: var(--accent);
      border: 1px solid rgba(0, 210, 255, 0.3);
      margin-bottom: 14px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.35;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.7;
    }

    /* 玻璃拟态卡片 */
    .glass-card {
      background: var(--bg-glass);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-md);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      box-shadow: var(--shadow-glass);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .glass-card:hover {
      border-color: var(--border-glass-hover);
      transform: translateY(-4px);
      box-shadow: 0 14px 40px rgba(0, 82, 217, 0.25);
    }

    /* 1. 首屏交互轮播与旗舰店导航 */
    #hero {
      padding: 60px 0 90px 0;
      position: relative;
      background-size: cover;
      background-position: center;
    }

    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 210, 255, 0.1);
      border: 1px solid rgba(0, 210, 255, 0.3);
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 13px;
      color: var(--accent);
      margin-bottom: 22px;
    }

    .hero-badge .pulse {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 10px var(--accent);
    }

    h1.hero-title {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 800;
      letter-spacing: -1px;
      margin-bottom: 20px;
    }

    h1.hero-title span {
      background: linear-gradient(90deg, #ffffff 20%, var(--accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-lead {
      color: var(--text-muted);
      font-size: 16px;
      line-height: 1.8;
      margin-bottom: 34px;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 38px;
    }

    .hero-stats-strip {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
    }

    .hero-stat-item .num {
      font-size: 24px;
      font-weight: 800;
      color: var(--text-white);
      font-feature-settings: "tnum";
    }

    .hero-stat-item .num span {
      color: var(--accent);
      font-size: 16px;
      margin-left: 2px;
    }

    .hero-stat-item .label {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 2px;
    }

    .hero-visual {
      position: relative;
    }

    .hero-main-card {
      position: relative;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-glass);
      background: linear-gradient(145deg, rgba(15, 23, 42, 0.9), rgba(11, 23, 57, 0.95));
      padding: 16px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    }

    .hero-main-card img {
      border-radius: var(--radius-md);
      width: 100%;
      height: 330px;
      object-fit: cover;
    }

    .hero-float-card {
      position: absolute;
      bottom: -24px;
      left: -24px;
      background: rgba(11, 23, 57, 0.92);
      backdrop-filter: blur(16px);
      border: 1px solid var(--accent);
      border-radius: var(--radius-md);
      padding: 16px 20px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .hero-float-card .icon-circ {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: rgba(16, 185, 129, 0.15);
      border: 1px solid var(--success);
      color: var(--success);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
    }

    /* 品牌旗舰系列导航条 */
    .brand-strip-nav {
      margin-top: 48px;
      background: rgba(15, 23, 42, 0.7);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-md);
      padding: 18px 24px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .brand-strip-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      cursor: pointer;
    }

    .brand-strip-item:hover {
      background: rgba(0, 210, 255, 0.1);
    }

    .brand-strip-icon {
      font-size: 20px;
      color: var(--accent);
    }

    .brand-strip-text h4 {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-white);
    }

    .brand-strip-text p {
      font-size: 11px;
      color: var(--text-muted);
    }

    /* 2. 架构与合规资质 */
    .arch-grid {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 48px;
      align-items: center;
    }

    .compliance-list {
      list-style: none;
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .compliance-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 14px 18px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-sm);
    }

    .compliance-badge {
      background: rgba(0, 210, 255, 0.15);
      color: var(--accent);
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 11px;
      font-weight: 700;
      white-space: nowrap;
      margin-top: 2px;
    }

    /* 3. 核心功能 6 卡矩阵 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      padding: 32px 26px;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-icon-box {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, rgba(0, 82, 217, 0.3), rgba(0, 210, 255, 0.15));
      border: 1px solid rgba(0, 210, 255, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      color: var(--accent);
      margin-bottom: 20px;
    }

    .feature-card h3 {
      font-size: 18px;
      margin-bottom: 12px;
      color: var(--text-white);
    }

    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .feature-meta {
      font-size: 12px;
      color: var(--accent);
      display: flex;
      align-items: center;
      gap: 6px;
      font-weight: 600;
    }

    /* 4. 多场景应用矩阵 */
    .scenario-tabs {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-bottom: 32px;
    }

    .tab-btn {
      padding: 16px 18px;
      background: var(--bg-glass);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-sm);
      color: var(--text-muted);
      cursor: pointer;
      text-align: center;
      transition: var(--transition);
    }

    .tab-btn.active, .tab-btn:hover {
      border-color: var(--accent);
      color: var(--text-white);
      background: rgba(0, 82, 217, 0.25);
      box-shadow: 0 0 15px rgba(0, 210, 255, 0.2);
    }

    .tab-btn h4 {
      font-size: 15px;
      margin-bottom: 4px;
    }

    .tab-btn span {
      font-size: 12px;
      opacity: 0.8;
    }

    .scenario-display {
      padding: 36px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }

    .scenario-display img {
      border-radius: var(--radius-md);
      border: 1px solid var(--border-glass);
      max-height: 320px;
      object-fit: cover;
      width: 100%;
    }

    /* 5. 数字化终端与工作台演示 */
    .terminal-tabs {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-bottom: 30px;
      flex-wrap: wrap;
    }

    .terminal-tab-item {
      padding: 10px 22px;
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid var(--border-glass);
      border-radius: 999px;
      font-size: 13px;
      color: var(--text-muted);
      cursor: pointer;
      transition: var(--transition);
    }

    .terminal-tab-item.active {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      border-color: transparent;
      box-shadow: 0 0 16px var(--accent-glow);
    }

    .terminal-mockup {
      padding: 24px;
      border-radius: var(--radius-lg);
      border: 1px solid rgba(0, 210, 255, 0.3);
      background: #070e24;
      box-shadow: 0 25px 60px rgba(0, 0, 0, 0.7);
    }

    .terminal-header-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding-bottom: 14px;
      margin-bottom: 20px;
    }

    .terminal-dots {
      display: flex;
      gap: 8px;
    }

    .terminal-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }

    .dot-red { background: #ef4444; }
    .dot-yellow { background: #f59e0b; }
    .dot-green { background: #10b981; }

    .terminal-status-info {
      font-size: 12px;
      color: var(--accent);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .terminal-content-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      align-items: center;
    }

    .terminal-screen-box img {
      width: 100%;
      height: 320px;
      object-fit: cover;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .terminal-callouts {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .callout-bubble {
      background: rgba(15, 23, 42, 0.85);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-sm);
      padding: 14px;
    }

    .callout-bubble h5 {
      font-size: 13px;
      color: var(--accent);
      margin-bottom: 4px;
    }

    .callout-bubble p {
      font-size: 12px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 6. 三大主力版本对比 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
      align-items: stretch;
    }

    .pricing-card {
      padding: 36px 28px;
      display: flex;
      flex-direction: column;
      position: relative;
    }

    .pricing-card.featured {
      border-color: var(--accent);
      background: linear-gradient(180deg, rgba(0, 82, 217, 0.22) 0%, rgba(15, 23, 42, 0.85) 100%);
      box-shadow: 0 0 35px rgba(0, 210, 255, 0.25);
      transform: scale(1.02);
    }

    .featured-tag {
      position: absolute;
      top: 0;
      right: 24px;
      background: linear-gradient(135deg, var(--accent), var(--primary));
      color: #fff;
      font-size: 11px;
      font-weight: 700;
      padding: 4px 12px;
      border-bottom-left-radius: 6px;
      border-bottom-right-radius: 6px;
    }

    .pricing-name {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .pricing-desc {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 20px;
      min-height: 38px;
    }

    .pricing-price {
      font-size: 28px;
      font-weight: 800;
      color: var(--accent);
      margin-bottom: 24px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding-bottom: 18px;
    }

    .pricing-price small {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: normal;
    }

    .pricing-features {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 30px;
      flex-grow: 1;
    }

    .pricing-features li {
      font-size: 13px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .pricing-features li::before {
      content: '✓';
      color: var(--accent);
      font-weight: bold;
    }

    /* 7. 深色智慧校园体育标杆理念 */
    .governance-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .quote-box {
      font-size: 18px;
      font-style: italic;
      color: var(--text-white);
      line-height: 1.8;
      border-left: 3px solid var(--accent);
      padding-left: 20px;
      margin-bottom: 24px;
    }

    .governance-points {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .gov-point-item {
      background: rgba(255, 255, 255, 0.02);
      border: 1px solid rgba(255, 255, 255, 0.06);
      padding: 14px;
      border-radius: var(--radius-sm);
    }

    .gov-point-item h5 {
      font-size: 13px;
      color: var(--accent);
      margin-bottom: 4px;
    }

    .gov-point-item p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 8. 教师与教研员故事 */
    .stories-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }

    .story-card {
      padding: 30px;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .story-author {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .story-avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      border: 1px solid var(--accent);
    }

    .story-author h4 {
      font-size: 15px;
      color: var(--text-white);
    }

    .story-author span {
      font-size: 12px;
      color: var(--text-muted);
    }

    .story-contrast {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      background: rgba(0, 0, 0, 0.25);
      padding: 14px;
      border-radius: var(--radius-sm);
    }

    .contrast-box h6 {
      font-size: 12px;
      margin-bottom: 4px;
    }

    .contrast-before h6 { color: #f87171; }
    .contrast-after h6 { color: #34d399; }
    .contrast-box p { font-size: 12px; color: var(--text-muted); line-height: 1.5; }

    /* 9. 关键数据统计条 */
    .metric-strip-section {
      padding: 56px 0;
      background: linear-gradient(90deg, #091330 0%, #060b19 50%, #091330 100%);
      border-top: 1px solid var(--border-glass);
      border-bottom: 1px solid var(--border-glass);
    }

    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .metric-col .metric-val {
      font-size: 40px;
      font-weight: 800;
      color: #fff;
      font-feature-settings: "tnum";
      line-height: 1.1;
      margin-bottom: 6px;
      text-shadow: 0 0 20px var(--accent-glow);
    }

    .metric-col .metric-val em {
      font-style: normal;
      font-size: 22px;
      color: var(--accent);
      margin-left: 2px;
    }

    .metric-col .metric-name {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 10. 标杆校评价墙 */
    .reviews-masonry {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      padding: 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }

    .review-stars {
      color: #f59e0b;
      margin-bottom: 12px;
      font-size: 13px;
      letter-spacing: 2px;
    }

    .review-school {
      display: flex;
      align-items: center;
      gap: 10px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 14px;
    }

    .school-crest {
      width: 34px;
      height: 34px;
      border-radius: 6px;
      background: rgba(0, 210, 255, 0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      color: var(--accent);
    }

    .school-info h5 {
      font-size: 13px;
      color: var(--text-white);
    }

    .school-info p {
      font-size: 11px;
      color: var(--text-dark);
    }

    /* 11. 部署架构对比选型 */
    .deploy-table-card {
      overflow-x: auto;
      padding: 0;
    }

    .deploy-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 13px;
    }

    .deploy-table th, .deploy-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .deploy-table th {
      background: rgba(11, 23, 57, 0.85);
      color: var(--accent);
      font-weight: 600;
    }

    .deploy-table td {
      color: var(--text-muted);
    }

    .deploy-table tr:hover td {
      background: rgba(255, 255, 255, 0.02);
    }

    /* 12. 政策与教改资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .news-card {
      display: flex;
      flex-direction: column;
    }

    .news-cover {
      height: 180px;
      width: 100%;
      object-fit: cover;
    }

    .news-body {
      padding: 22px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }

    .news-date {
      font-size: 11px;
      color: var(--accent);
      margin-bottom: 8px;
    }

    .news-card h3 {
      font-size: 16px;
      margin-bottom: 10px;
      line-height: 1.4;
      color: #ffffff;
    }

    .news-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 14px;
      flex-grow: 1;
    }

    /* 13. FAQ 手风琴 */
    .faq-accordion {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-sm);
      background: var(--bg-glass);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: var(--accent);
      background: rgba(15, 23, 42, 0.85);
    }

    .faq-question {
      padding: 18px 22px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 15px;
      font-weight: 600;
      user-select: none;
    }

    .faq-arrow {
      width: 18px;
      height: 18px;
      transition: transform 0.3s;
      fill: var(--accent);
    }

    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }

    .faq-answer {
      display: none;
      padding: 0 22px 20px 22px;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    /* 14. 底部开通预约强转化 CTA */
    .cta-container {
      background: linear-gradient(135deg, rgba(11, 23, 57, 0.95), rgba(6, 11, 25, 0.95));
      border: 1px solid var(--accent);
      border-radius: var(--radius-lg);
      box-shadow: 0 0 50px rgba(0, 210, 255, 0.2);
      padding: 48px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .cta-form {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .form-group input, .form-group select {
      width: 100%;
      padding: 13px 16px;
      background: rgba(15, 23, 42, 0.8);
      border: 1px solid var(--border-glass);
      border-radius: var(--radius-sm);
      color: #fff;
      font-size: 14px;
      transition: var(--transition);
    }

    .form-group input:focus, .form-group select:focus {
      border-color: var(--accent);
      box-shadow: 0 0 10px rgba(0, 210, 255, 0.3);
    }

    .form-group select option {
      background: #0f172a;
      color: #fff;
    }

    /* 页脚 Footer */
    .site-footer {
      background: #03060f;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 70px 0 30px 0;
      color: var(--text-muted);
      font-size: 13px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-brand h4 {
      font-size: 18px;
      color: #fff;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      color: #fff;
      font-size: 14px;
      margin-bottom: 18px;
      letter-spacing: 0.5px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a:hover {
      color: var(--accent);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 12px;
      color: var(--text-dark);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-wrapper, .arch-grid, .scenario-display, .terminal-content-grid, .governance-wrapper, .cta-container {
        grid-template-columns: 1fr;
      }
      .features-grid, .pricing-grid, .reviews-masonry, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .brand-strip-nav, .scenario-tabs {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-float-card {
        bottom: 12px;
        left: 12px;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(6, 11, 25, 0.98);
        border-bottom: 1px solid var(--border-glass);
        flex-direction: column;
        padding: 24px;
        gap: 18px;
      }
      .nav-links.active {
        display: flex;
      }
      h1.hero-title {
        font-size: 30px;
      }
      .section-title {
        font-size: 24px;
      }
      .metrics-bar, .stories-grid {
        grid-template-columns: 1fr;
      }
      .features-grid, .pricing-grid, .reviews-masonry, .news-grid {
        grid-template-columns: 1fr;
      }
      .scenario-tabs, .brand-strip-nav {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .top-bar-item:nth-child(2) {
        display: none;
      }
      .cta-container {
        padding: 28px 20px;
      }
    }